| Location: | Ontonagon County, Michigan, United States, North America |
| Lat / long: | 46.72722, -89.18674 |
| dep_id: | 10106197 |
| mrds_id: | W031505 |
| Commodity type: | metallic |
| Major mineral: | Copper |
| Minor mineral: | Silver |
| Operation type: | Underground |
| Deposit type: | Secondary Enrichment |
| Production size: | Large ammount of material produced |
| Development status: | Past Producer |
| ore: | Copper, Silver |
| gangue: | Quartz, Calcite, Epidote, Pumpellyite-(Mg), Chlorite, Feldspar |
| orebody_fm: | TABULAR FISSURE |
| model: | 96: Native Cu |
| alteration: | Removal of hematite, copper replacement, quartz-pumpellyite bleaching |
| ore_ctrl: | Concentrated in shoots (stratigraphic in amygdaloid or fissure related) |
| Reporter: | Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere), Yeager, Keith (Cannon, W.) |
| hrock_unit: | Portage Lake Volcanics |
| hrock_type: | Basalt |
| Year first produced: | 1848 |
| yr_lst_prd: | 1908 |
| References: |
- Deposit:: COPPER RANGE CO., UNPUBLISHED, 1968, BEDROCK GEOLOGY MAP OF THE ROCKLAND (NW1/4) QUADRANGLE, ONTONAGON COUNTY, MICHIGAN GEOLOGY MAPPED AND COMPILED BY COPPER RANGE EXPLORATION CO., INC., AND BY H. HUBBARD (U.S.G.S.)
- Deposit:: BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: U.S. GEOLOGICAL SURVEY PROF. PAPER 144, 238P.
- Deposit:: WILBAND, J.T., 1978, THE COPPER RESOURCES OF NORTHERN MICHIGAN; PREPARED FOR THE U.S. BUREAU OF MINES, CONTRACT NO-J0366067,66P.
- Deposit:: JOHNSON, A.M., AND GROTH, E.H.,, 1998, INVENTORY OF UNDERGROUND MINES, ONTONAGON COUNTY, P. 183-187, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.
- Production:: BUTLER AND BURBANK (1929)
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